It is the principle strengthening element in carbon steels and low-alloy steels. Atomic number 6, atomic weight 12.01115. Manganese (Mn): Manganese is a brittle, metallic element that exists in ...

There are some exceptions though. For example, mercury is a liquid at room temperature. The metals in Group 1, such as lithium, sodium and potassium, are all soft. Many non-metals have low melting ...

Plants often use organic compounds to defend themselves from herbivory, but they also use metallic elements from the soil for this purpose. Aa Aa Aa Plants and herbivores are locked in an ...